Composite film



Afff' f A 153mm f J. H. HASTE v COMPOSITE' FILM Filed oct. 2, 1922 ATTORNEY but may be detected and determined by the customary analytical methods. If films of the type described be cut up into strips which serve as the supports in motion picture ilms, the edges of the central layer 2 will be exposed. The area thus exposed is, however, so relatively minute that the loss of moisture through it, even under dry conditions, does not prevent a useful prolongation of the flexibility of the central acetate layer by the moisture-sealing layers.

Having thus described my invention, what.

I claim as new and desire to secure by Letters Patent is:

1. A ycomposite lrh comprising a layer of cellulose acetate containing moisture which induces iexibility therein, said layer being covered on each face thereof With a layer Which restrains the exit of said moisture from said lirst named layer, said second named layer containing inflaminability-reducing substances.

2. A composite film comprising a transparent exible layer of acetone-soluble cel-l lulose acetate containing moisture, said layers being united to and covered on each face with a transparent flexible layer of nitrocellulose which restrains the exit ot' moisture from said cellulose acetate and contains an inlammability reducing substance. Signed at Rochester, New York, this 26th day of September 1922.

JAMES H. HASTE. 

